hi everybody. nice forum you got here. looking foward to many years of enjoying it. i recently obtained an older johnson energy sys j-9900 wood furnace. its in pretty good shape for its age. does anyone here own one of these? i know im going to have several installation questions in the near future but for now im just trying to get it ready to install. does anyone have a wire diagram for the fans, switches, and thermostat on the back of it? i already hard wired the blowers and they both work and the smaller blower in the center which i think is called a draft blower it also works. when i got the furnace most of the wires were unhooked and it also has some sort of transformer screwed to the back of it that has a few wires coming from it. i have not seen another furnace with this on it. i will take a picture of it tomorrow and post it. only other questions i got right now are there are a few fire bricks that are cracked, should they be replaced or is it just cosmetic related? and last is the chimney connector on the back of the furnace is 7", would it hurt to reduce it to a 6" chimney? thanks for your help.